Injector for steam-boilers.



No. 629,562. Patented July 25, I899.

- L. E. HDGUE.

INJECTOR FOR STEAM BOILERS.

(Application filed June 3, 1899.)

(ModeL) 2 UNITED" STATES PATENT Granule.v

LOVREN E. HOGUE, OF GREENEVILLE, PENNSYLVANIA.

INJECTOR FOR STEAM-BOILERS.

SPECIFICATION forming part of Letters Patent No. 629,562, dated July 25, 1899.

Application filed June 23,1899. Serial No. 719,291. (ModeL) To all whom it may concern.-

Be it known that I, LOVREN E. HoGUE,a citizen of the United States, residing at Greeneville, in the county of Mercer and State of Pennsylvania, have invented new and useful Improvements in Injectors for Steam-Boilers, of which the following is a specification.

Myinvention relates toinjectors for steam-' boilers, the objects of the same being to provide means for indicating from without the.

shell of the injector the position of the overflow-valves, and thereby determine the action of the injector; means for providing a perfect seal between the overflowvalves and the working barrel to provide against the introduction of air through said valves; means for automatically sealing one or the other of said valves in case of an accidental leak,and means for preventing communication between the two overflow-chambers.

Other objects and advantages of the invention will hereinafter appear, and the novel features thereof will be set forth in the claims.

In the drawings forming part of this specification, Figure 1- is a longitudinal'sectional View of an injector constructed according to my invention, and Fig. 2 is a cross-section on the line 2 2 of Fig. 1.

Like reference-numerals indicate like parts in both views.

The shell or casing l of the injector is provided with the usual threaded extensions 2, 3, and 4 for steam, water, and delivery connections. It is also provided on the inside with the perforated and internally-screwthreaded partitions 5, 6, and 7, forming the steam-chamber 8, the suction or water (3113111: ber 9, the cold-water overfiow chamber 10, and the hot-water-overflow chamber 11. Se-

cured within the partition 5 is a steam tube by a valve 13, which is operated by a lever 14,

pivoted to the stem thereof, as clearly shown. Instead of the particular form of valve illustrated, however, I may employ any other suitable form of valve. The steam tube or nozzle 12 terminates at its forward end within the suction-chamber 9 and also projects slightly within the lifting tube or nozzle 15, which is secured within the partition 6 of the v stem thereof.

further provided with lateral openings 19 20,

the openings 19 leading into the cold-wateroverflow chamber 10, and theopenings 20into the hot-water-overflow chamber 11. The rear end of the condensing or delivery'tube 16 has secured upon it a cap 21, having side openings 22 therein and a central longitudinal opening at its rear end. The said cap constitutes a valvecasing for a spring-actuated checkvalve 23, which seats in the outer end of the condensing or delivery tube 16.

Above the hot and cold water overflow,

chambers 10 and 11 is formed integral with the shell I a valve-casing 24, which may be termed a hot and cold overflow chamber. The said casing extends around upon both sides of the shell 1 and terminates in an overflow-pipe 25 upon the lower side ofthe shell 1. Communicating with the valve-casing are a cold-water-overtlow passage 26 and a hotwater-overflow passage 27, at the upper end of each of which, respectively, is a valve-seat 28 29, each of said valve-seats having an annular recess or pocket 30 around it. Cooperating with the said valve-seats are gravity check-valves 31 32, respectively, each having an annular depending lip 33, which is adapted to fit'down into the annular recess 30, surrounding the seat which it is adapted to engage. The stems 34 35 of said valves extend upwardlyinto or through openings in the caps 36 37, which are screwed or otherwise secured in the upper end of the valve-casing. \Vhen the valves are closed, the upper ends of thestems 34 35 occupy a position flushwith or below the upper ends of the caps through which they pass, so that when one or the other of said valves is raised it will be indicated from without by the elevated position of the A passage 38 connects the spaces in which the valves 31 32 work, and from the passage 38 leads the cond nit 39,which communicates with the overflow-pipe 25,11eretofore referred to. A suitable globe or other valve is providediu the neck 3 or the waterpipe which connects therewith for the purpose of controlling the supply of water to the suction-chamber 9.

With the neck 4 connected with the boiler or other device to be supplied with water, with the neck 2 connected with a steam-sup ply, and the neck 3 connected with a tank, well, or other supply of water the operation of my device is as follows: Upon the opening of the valve 13 steam is caused to pass through the steam-tube 12 and the other working tubes of the injector and water drawn up through the neck 3 until all air on the inside of the injector has been expelled and a perfect vacuumsecured inside the working barrel. The valves 31 and 32 are now closed and remain so as long as the injector is in successful-operation. As the maintenance of a perfect vacuum is necessary for the successful operation of injectors of this'character, I have provided for a water seal between the valves 31 and 32, the annular recesses 29 and 30 receiving and holding a small quantity of water or condensed steam, which is expelled from the interior of the shell when the steam is first turned on. When the valves are in their lowermost position, therefore, it will be seen that the depending lips 33 dip down into the waterin the annular recesses 29, and thereby form a perfect joint with the seats 28, through which no air may pass. Now then if a leak should occur in the valve 31, due to cracking or any other cause, air would enter the cold-wateroverflow chamber 10 and cause a cessation of the operation in said chamber. At the same time, however, the valve 32 would be raised and water would pass from the hotwater-overflow chamber 11 through the passage 27, across the passage 28 and cover the valve 31, thereby sealing or closing the crack or break therein and preventing further entrance of air. The injector would now operate successfully until the water which acts as a seal is absorbed, when the same operation would be repeated. If the valve 31 rises, which is indicated from the outside of the injector by the projection of the stem 34 from the upper end of the cap 36, it would show that too much cold water was being supplied, and to correct the matter it would be merely necessaryto operate the valve in the threaded extension 3 to shut off the supply of water. When this is done, the valve 31 will return to its seat and the injector operate properly. If the valve 32 should rise, which will be inclicated from the outside in -a similar manner, it would show that the steam was not being condensed in the tube 16 and that therefore more water should be supplied. This could be remedied by operating the valve in the thread ed extension 3, letting in more water and causing the valve to return to its seat.

It will be observed that the hot and cold water overflows discharge directly to the outside of the working barrel and that there is no open communication between the passages 26and 27. The temperature of one of the overflow-chambers, therefore, cannot be affected by the other, as is done where the hot steam and water from both overflows are thrown into the inside of the injector, thus de-trimentally affecting the working tubes which the overflows surround. When the working barrel receives the overflows from both chambers, as is done in some of the inj ectors which have preceded mine, the water is drawn by the suction of a perfect Working tube from one overflow to the other, always with disastrous results. By my construction both of these objections are overcone.

Having now describedmy invention, what I claim as new, and desire to secure by Letters Patent, is

1. In an injector, the combination with the shell thereof having hot and cold water overflow chambers therein, valves for controlling the passages from said overflow-chambers, and means for indicating from without the position of said valves. j

'2. In an injector, the combination with the shell thereof having hot and cold water overflow chambers therein, of a valve-casing outside said overflow-chambers,but communicating therewith, valves in said casing for controlling the passages between said chambers and said casing, and means for indicating from without the position of said valves.

3. In an injector, the combination with the shell thereof having hot-andcold water overflow chambers therein, of a valve-casing outside said overflow-chambers, but communicating therewith, valves in'said casing for controlling the passages between said chambers and said casin g, and caps in said valve-casing having openings therein in which the stems of said valves fit and move, and by means of which the position of said valves may be indicated from Without.

1. In an injector, the combination-with the shell thereof having hot and cold wateroverflow chambers therein, of a valve-casing communicating with said chambers, valve-seats having annular recesses surrounding them in the passages between said casing and said chambers, and valves having projecting lips thereon adapted to fit within said recesses, as and for the purpose set forth.

5. In an injector, the combination with the shell thereof having hot and cold water overflow chambers therein, of a valve-casing outside said chambers communicating therewith, valve-seats in the passages between said chambers and said casing having annular recesses surrounding them for the reception of water, valves having projecting lips thereon adapted to fit in said recesses, a passage be tween the spaces in which said valves work, a hot and cold overflow discharge-pipe on the under side of the shell, and a conduit leading ICC tween the cold and hot Water overflow chambers, a disk thereon abutting'against the rear end of said shell, closing the rear end of said hot-water-overfiow chamber, and a checkvalve in said condensing or delivery tube.

In testimony whereof I have hereunto set my hand in presence of two subscribing wit- 2o nesses.

LOVREN E. HOGUE.

Witnesses:

L. A. BURNETT, QUINTON J. BURNETT. 

